Dunlop SP Sport MAXX 285/30 R20

Dunlop SP Sport MAXX is a summer tyre made in total of 57 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/30 R20 is 70mm wider than the narrowest dimension (215) and 20mm narrower than the widest one (305). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (285mm), which results in 85.5mm sidewall height.